CN211399343U - Pressure regulating and stabilizing device for gas - Google Patents
Pressure regulating and stabilizing device for gas Download PDFInfo
- Publication number
- CN211399343U CN211399343U CN201922077357.0U CN201922077357U CN211399343U CN 211399343 U CN211399343 U CN 211399343U CN 201922077357 U CN201922077357 U CN 201922077357U CN 211399343 U CN211399343 U CN 211399343U
- Authority
- CN
- China
- Prior art keywords
- pressure
- pressure regulating
- regulating module
- control system
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a pressure regulating and stabilizing device for gas, which is suitable for a zero gas generator device and is used for providing zero gas for the analysis of a flue gas dilution method of a power plant, and comprises a pressure regulating module, a pressure sensor, a control system and a gas flowing pipeline, wherein the pressure regulating module, the pressure sensor and the control system are connected with the gas flowing pipeline through a control circuit to form a closed-loop control system for outputting gas pressure; the pressure regulating module of the utility model uses the motor structure to control the pressure regulating valve to regulate and stabilize the air pressure, but not the pressure control of the existing proportional valve or pressure relief valve, so that the regulating precision is higher; the pressure regulating range of the embodiment is larger, and the pressure can be reduced to zero (namely, fully closed) at the output end and can be increased to reach the lowest value of the input pressure; furthermore, the utility model discloses not only can export invariable settlement pressure, can export the pressure that changes as required moreover.
Description
Technical Field
The utility model relates to a gaseous pressure regulating and voltage regulator device can be used to the measuring instrument that needs the stable pressure air supply or other applications that have the same needs and use, belongs to measurement or detection area.
Background
In some measurement and detection systems, a source of gas at a steady pressure is required to assist in the completion of the measurement and detection. For example, the measurement of the smoke components by the dilution method requires zero gas with a certain pressure as the dilution gas to dilute the sample gas in a certain proportion, and the pressure of the zero gas needs to maintain a certain stability, otherwise, the fluctuation of the zero gas pressure affects the dilution ratio, and further affects the accuracy of the measurement result. For example, in the air permeability and waterproof test of an ePTFE membrane (a microporous membrane formed by expanding and stretching polytetrafluoroethylene) the industry requires test pressures of 7KPa and 30KPa respectively, so that an air source corresponding to stable pressure is required.
The existing gas pressure regulation and pressure stabilization are generally completed through a proportional valve, but the pressure regulation and control precision of the proportional valve is not high, for example, the regulation precision of the high-end proportional valve in the current market is +/-0.5% of the range, namely the regulation error under the range of 0-0.5MPa is +/-2.5 KPa, and the regulation error under the range of 0-0.1MPa is +/-0.5 KPa. The adjusting precision of the pressure-control valve meets the requirement of general industry pressure control, but for some high-precision measuring systems, the adjusting and pressure-control precision of the pressure-control valve can not completely meet the requirement, particularly the application of relatively low constant air pressure requirement such as the air permeability detection of ePTFE membrane.
In addition, for the application of higher output pressure (0. XMPa output pressure), the current pressure regulation and stabilization mode is to connect a pressure relief valve at the output end, and when the upstream pressure is greater than the threshold value of the pressure relief valve, the valve core of the pressure relief valve is jacked up to release certain gas, so as to ensure the downstream pressure to be stable. The disadvantage of this approach is that the upstream air supply needs to be sufficient, otherwise the output will fluctuate; the mode has large consumption of air sources, so the use cost is high; in addition, the output pressure of the mode corresponds to the starting threshold value of the pressure release valve one by one, and a controllable pressure curve cannot be adjusted or output in a later period.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a gaseous pressure regulating and pressure stabilizing device.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a pressure regulating and stabilizing device for gas comprises a pressure regulating module, a pressure sensor, a control system and a gas flow pipeline, wherein the pressure regulating module, the pressure sensor and the control system are connected with the gas flow pipeline through a control circuit to form a closed-loop control system for outputting gas pressure; the pressure regulating module comprises a motor, a pressure regulating valve, a fixing piece and a coupler, an output shaft of the motor is connected with the pressure regulating valve through the coupler, and the motor and the pressure regulating valve are fixed through the fixing piece to enable the outer parts of the motor and the pressure regulating valve to be relatively fixed; the pressure sensor is communicated with the gas flow pipeline and is positioned at the downstream end of the pressure regulating module; the motor is connected with the control system through the control circuit, the pressure sensor is connected with the control system through the control circuit, and the control system controls the motor to rotate according to the current gas pressure value fed back by the pressure sensor in a feedback mode, so that the pressure regulating valve is driven to regulate the gas pressure.
Still further, still include reserve pressure regulating module, reserve pressure regulating module inner structure all with rather than inner structure's interconnect mode the pressure regulating module is the same, and reserve pressure regulating module and control system pass through control circuit and connect, and a branch pipe is separated out to the gas flow pipeline of the upstream end of pressure regulating module, and the low reaches end of pressure regulating module is connected to this branch pipe other end, connects reserve pressure regulating module on the branch pipe, and the branch pipe is located pressure sensor's upstream end, and reserve pressure regulating module is parallelly connected with pressure regulating module, is equipped with the normally open valve on the branch pipe at reserve pressure regulating module place, is equipped with the normally closed valve on the gas flow pipeline at pressure regulating module place.
Furthermore, the motor is selected from an alternating current motor, a stepping motor, a servo motor or other motors capable of controlling positive rotation and negative rotation.
Furthermore, the control system is a single chip microcomputer, a PCL or other control systems.
Furthermore, the pressure regulating valve is a gas regulating valve which realizes the adjustment of the opening degree by mechanical screwing.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following: the utility model uses the motor structure to control the pressure regulating valve to regulate and stabilize the air pressure, but not the pressure control of the prior proportional valve or pressure relief valve, so that the regulation precision is higher; the pressure regulating range of the embodiment is larger, and the pressure can be reduced to zero (namely, fully closed) at the output end and can be increased to reach the lowest value of the input pressure; in addition, the utility model can not only output constant set pressure, but also output variable pressure according to the requirement; and simultaneously, the utility model discloses be equipped with reserve pressure regulating module, directly open reserve pressure regulating device place pipeline and circuit structure after original regulator breaks down, reserve pressure regulating device continues to adjust atmospheric pressure, has improved the reliability of zero gas generator, has improved the fault-tolerant rate of this device.
Drawings
Figure 1 is a schematic view of the principle of the present invention,
FIG. 2 is a schematic structural diagram of the pressure regulating module of the present invention,
FIG. 3 is a schematic diagram of the full-section structure of the pressure regulating module of the present invention,
figure 4 is a schematic diagram of a second embodiment of the present invention,
the device comprises a pressure regulating module 1, a pressure sensor 2, a control system 3, a control circuit 4, a gas flow pipeline 5, a standby pressure regulating module 6, a normally open valve 7, a normally closed valve 8, a motor 101, a pressure regulating valve 102, a fixing part 103 and a coupler 104.
Detailed Description
The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.
The utility model is suitable for a zero gas generator device for provide zero gas for power plant's flue gas dilution analysis, the pressure regulation and the control part of this zero gas generator are the utility model discloses a pressure regulating and voltage stabilizing device, its schematic diagram is shown as figure 1 (arrow direction is the direction that the gas flows in the figure), including pressure regulating module 1, pressure sensor 2, control system 3 and gas flow pipeline 5, pressure regulating module 1, pressure sensor 2 and control system 3 are connected with gas flow pipeline 5 through control circuit 4 and are constituteed the closed loop control system of an output atmospheric pressure; as shown in fig. 2 and 3, the pressure regulating module 1 includes a motor 101, a pressure regulating valve 102, a fixing member 103 and a coupling 104, an output shaft of the motor 101 is connected with the pressure regulating valve 102 through the coupling 104, and the motor 101 and the pressure regulating valve 102 are fixed by the fixing member 103 so that the outer parts of the two are kept relatively fixed; the air inlet of the pressure regulating valve 102 is connected with the upstream of the gas flow pipeline 5, the air outlet is connected with the downstream of the gas flow pipeline 5, and the pressure sensor 2 is communicated with the gas flow pipeline 5 and is positioned at the downstream end of the pressure regulating module 1; the motor 101 is connected with the control system 3 through the control circuit 4, the pressure sensor 2 is connected with the control system 3 through the control circuit 4, and the control system 3 controls the motor 101 to rotate according to the current gas pressure value fed back by the pressure sensor 2 in a feedback mode, so that the pressure regulating valve 102 is driven to regulate the gas pressure.
In this embodiment, the motor 101 is an ac motor, a stepping motor, a servo motor or other controllable forward and backward rotation motors; the control system 3 can be controlled by other control systems such as a single chip microcomputer, a PCL (programmable logic controller) or a LabVIEW (laboratory virtual engineering workbench), the control system 3 in the embodiment adopts an STM32 single chip microcomputer as a microcontroller of the control system, the control system further comprises a liquid crystal display, a digital-to-analog conversion module and five keys, and the liquid crystal display is 4 inches and is used for displaying output pressure, a control precision set value and real-time output pressure; the digital-to-analog conversion module is a 16-digit digital-to-analog conversion module and is used for digital-to-analog conversion of the analog quantity of the pressure sensor; the key is used for outputting pressure and controlling precision; in addition, the control system 3 can also select PCL or LabVIEW as the control system, the output pressure of the control system is respectively set to be 7KPa and 30KPa, and in the application that the output pressure in the zero gas generator needs to be lower, the control precision can be within +/-0.1 KPa, and the control system has great advantages compared with the prior proportional valve.
The pressure regulating module 1 of the present embodiment uses a 42-step motor and a mechanical pressure regulating valve, and the pressure regulating valve 102 is a gas regulating valve whose opening is adjusted by mechanical screwing. The motor 101 is connected with the rotating shaft of the pressure regulating valve 102 through a coupler 104, the shell structures are mutually fixed through a fixing piece 103 with an aluminum structure, the measuring range of the pressure sensor 2 is 0-1MPa, 4-20mA analog quantity signals are output,
the utility model discloses the general delivery pressure of zero gas generator that is suitable for requires about 0.3MPa, and in this settlement pressure range, the pressure control precision of this embodiment can maintain in 0.001MPa (being 1 KPa) for a long time, consequently has very high pressure control precision.
In order to improve the utility model discloses a feedback system, still put forward the second embodiment, as shown in fig. 4 (the arrow point direction in the figure is the direction of gas flow), this pressure regulating still includes a reserve pressure regulating module 6 with voltage regulator device, the inner structure of reserve pressure regulating module 6 all is the same with pressure regulating module 1 rather than the interconnect mode of inner structure, reserve pressure regulating module 6 and control system 3 pass through control circuit 4 and connect, the gas flow pipeline 5 of the upstream end of pressure regulating module 1 branches a branch pipe, the low reaches end of pressure regulating module 1 is connected to this branch pipe other end, connect reserve pressure regulating module 6 on the branch pipe, the branch pipe is located pressure sensor 2's upstream end, reserve pressure regulating module 6 is parallelly connected with pressure regulating module 1, be equipped with normally open valve 7 on the branch pipe at reserve pressure regulating module 6 place, be equipped with normally closed valve 8 on the gas flow pipeline 5 at pressure regulating module 1 place. The purpose of this standby voltage regulation module 6 is to: the pressure value of the pressure regulating gas detected by the pressure sensor 6 received by the control system 4 fluctuates within a certain range, the precision of the fluctuation range is within +/-0.001 MPa (namely +/-1 KPa), when the precision range is exceeded, a worker can judge that a motor 101 or a pressure regulating valve 102 in the pressure regulating device breaks down, at this time, a normally open valve 7 on a branch pipe where the standby pressure regulating module 6 is located is closed, a normally closed valve 8 on a pipeline where the pressure regulating module 1 is located is opened, the gas to be treated enters the standby pressure regulating module 6, the pressure sensor 2, the control system 3 and the gas flowing pipeline 5 form a new closed-loop control system, the control system 4 controls the standby pressure regulating module 6 to operate, the standby pressure regulating device 2 continues to regulate the gas pressure, and the reliability and the fault tolerance of the zero gas generator are improved.
Furthermore, the utility model provides a pressure regulating and voltage stabilizing device not only can be used for the pressure regulating and the steady voltage to gas, can expand to the pressure regulation and the stability to other fluidic.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a gaseous pressure regulating and voltage regulator device which characterized in that: the device comprises a pressure regulating module (1), a pressure sensor (2), a control system (3) and a gas flow pipeline (5), wherein the pressure regulating module (1), the pressure sensor (2) and the control system (3) are connected with the gas flow pipeline (5) through a control circuit (4) to form a closed-loop control system for outputting gas pressure;
the pressure regulating module (1) comprises a motor (101), a pressure regulating valve (102), a fixing piece (103) and a coupler (104), wherein an output shaft of the motor (101) is connected with the pressure regulating valve (102) through the coupler (104), and the motor (101) and the pressure regulating valve (102) are fixed through the fixing piece (103) to enable the outer parts of the motor (101) and the pressure regulating valve (102) to be relatively fixed;
the air inlet of the pressure regulating valve (102) is connected with the upstream of the gas flow pipeline (5), the air outlet of the pressure regulating valve is connected with the downstream of the gas flow pipeline (5), and the pressure sensor (2) is communicated with the gas flow pipeline (5) and is positioned at the downstream end of the pressure regulating module (1);
the motor (101) is connected with the control system (3) through the control circuit (4), the pressure sensor (2) is connected with the control system (3) through the control circuit (4), and the control system (3) controls the motor (101) to rotate according to the current gas pressure value fed back by the pressure sensor (2) in a feedback mode, so that the pressure regulating valve (102) is driven to regulate the gas pressure.
2. The voltage regulating and stabilizing device according to claim 1, characterized in that: still include reserve pressure regulating module (6), reserve pressure regulating module (6) inner structure all with its inner structure's interconnect mode with pressure regulating module (1) is the same, reserve pressure regulating module (6) and control system (3) are connected through control circuit (4), a branch pipe is separated out in gas flow pipeline (5) of the upper reaches end of pressure regulating module (1), the low reaches end of pressure regulating module (1) is connected to this branch pipe other end, connect reserve pressure regulating module (6) on the branch pipe, the branch pipe is located the upper reaches end of pressure sensor (2), reserve pressure regulating module (6) are parallelly connected with pressure regulating module (1), be equipped with normally open valve (7) on the branch pipe at reserve pressure regulating module (6) place, be equipped with normally open valve (8) on gas flow pipeline (5) at pressure regulating module (1) place.
3. The voltage regulating and stabilizing device according to claim 1, characterized in that: the motor (101) is an alternating current motor, a stepping motor, a servo motor or other controllable positive and negative rotation motors.
4. The voltage regulating and stabilizing device according to claim 1, characterized in that: the control system (3) is a single chip microcomputer, a PCL or other control systems.
5. The voltage regulating and stabilizing device according to claim 1, characterized in that: the pressure regulating valve (102) is a gas regulating valve which realizes the adjustment of the opening degree through mechanical screwing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922077357.0U CN211399343U (en) | 2019-11-27 | 2019-11-27 | Pressure regulating and stabilizing device for gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922077357.0U CN211399343U (en) | 2019-11-27 | 2019-11-27 | Pressure regulating and stabilizing device for gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211399343U true CN211399343U (en) | 2020-09-01 |
Family
ID=72232649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922077357.0U Active CN211399343U (en) | 2019-11-27 | 2019-11-27 | Pressure regulating and stabilizing device for gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211399343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505212A (en) * | 2020-12-11 | 2021-03-16 | 江苏汇环环保科技有限公司 | Pressure control device suitable for online gas chromatograph |
-
2019
- 2019-11-27 CN CN201922077357.0U patent/CN211399343U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505212A (en) * | 2020-12-11 | 2021-03-16 | 江苏汇环环保科技有限公司 | Pressure control device suitable for online gas chromatograph |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7069944B2 (en) | Flow rate control device | |
| CN211399343U (en) | Pressure regulating and stabilizing device for gas | |
| CN107152551B (en) | A kind of Regulation Control method and Regulation Control device | |
| CN102095598A (en) | Valve comprehensive test system | |
| CN111408289B (en) | Method and system for industrially continuously mixing gas with high precision | |
| CN210424507U (en) | Gas pressure regulating pry | |
| CN103334799B (en) | Method and system for controlling air inflow of double air inflow condensation-type turbine | |
| CN108427443B (en) | High-precision automatic oxygenation device and automatic oxygenation method | |
| CN204989996U (en) | Gas flow regulator | |
| CN109268346A (en) | A kind of oil pump performance test loop | |
| CN109237111A (en) | A kind of pressure-regulating hydraulic system and its control method of self-balancing pressure regulator valve | |
| CN201161168Y (en) | Follow-up flow capacity gas mixing machine | |
| CN202705569U (en) | Pressure control system for silicon carbide single crystal growing furnace | |
| CN213680558U (en) | Gas mixing system for power station | |
| CN217821358U (en) | Laminar flow quality and flow control system based on cascade control | |
| CN112764437A (en) | Automatic control method for air flow regulation of test bed based on pneumatic regulating valve | |
| CN108116696B (en) | Self-correcting thrust hydrazine propelling method | |
| CN219642116U (en) | Remote automatic control calibration equipment for gas | |
| CN108119259B (en) | Self-correcting thrust hydrazine propelling device and method thereof | |
| CN212188621U (en) | Dynamic air distribution device | |
| CN113741560A (en) | Laminar flow quality and flow control system and control method based on cascade control | |
| CN205562140U (en) | Steady voltage system and be used for testing equipment in aerospace field | |
| CN114306996B (en) | Compressed air foam generating device and using method thereof | |
| CN213545105U (en) | Ozone generator pressure control system | |
| CN201748154U (en) | Large gasifier liquid-level control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |